Broadly agree with this but I do think it's worth mentioning that Dave has his share of the blame in the fact that we fall to shit when the team comes under pressure (and I know you do make this point
@Oranges038).
Every time an opponent smells blood and begins to apply some pressure to our back line, every kick from De Gea goes long. It makes it really difficult to calm the game down and take back any semblance of control.
I'm not saying he's solely to blame for this issue but it's yet another reason to add to the list of reasons why he should not be our starting keeper moving forward.